KR19980066159A - Data transmission and reception device of automatic temperature control system - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission / reception apparatus for an automatic temperature control system for a vehicle, and more particularly, to a control panel including a plurality of function switches and a display unit for adjusting and displaying a temperature and a ventilation state of a vehicle interior, and a predetermined operation panel of the control panel. System control means for scanning a function switch key input and outputting a predetermined control signal, data transmission and reception means implemented between the operation panel and the system control means and transferring switch input information of the operation panel to the system control means; And a temperature driver configured to perform temperature adjustment and driving operations corresponding thereto according to a predetermined temperature and ventilation related control signal of the system control means.

Therefore, the present invention implements a data transmission / reception means of serial communication between an operation panel for selecting a predetermined temperature control function and a system control means for transmitting the signal, thereby greatly reducing the number of signal lines, thereby simplifying the circuit lines of the circuit. This can greatly reduce the failure caused by the signal line.

Description

Data transmission and reception device of automatic temperature control system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic temperature control system for a vehicle, and in particular, a serial communication data transmission / reception means is provided between an instrument panel for selecting a predetermined temperature control function and a system control means for transmitting a signal thereof. The present invention relates to a data transmission / reception apparatus of an automatic temperature control system which greatly reduces the number of signal lines, checks the input of a function switch of the operation panel at regular intervals, and simply transmits a corresponding signal to the system control means.

FIG. 1 is a block diagram showing a conventional automatic temperature control system for a vehicle, and is composed of an operation panel 10, a system control means 20, and a temperature driving part 30. As shown in FIG.

The operation panel 10 is provided with a number of temperature-related function switches and displays, and when a predetermined function switch is selected, the operation panel 10 is transferred to the system control means 20 along a signal line corresponding thereto, and the system control means 20 is The selection signal of the function switch is scanned and a control signal corresponding thereto is output to the temperature driver 30, and the temperature driver 30 performs temperature-related operation according to the control signal of the system control means 30.

In addition, the system control unit 20 scans the function switch input of the operation panel 10 and outputs a control signal corresponding thereto to the display unit of the operation panel 10 to display the temperature-related state of the vehicle interior.

As shown in the figure, in the conventional automotive automatic temperature control system, the number n of signal lines between the operation panel 10 and the system control means 20 is greater than the number N of function switches in the operation panel 10. ) Was installed more (N n).

Therefore, the configuration of the device is more complicated due to the many signal lines as described above, and many power lines and various types of signal lines are mixed with each other in the automobile circuit section, thereby increasing the risk of failure.

The object of the present invention is to solve the above problems of the prior art, by implementing a serial communication method of transmitting and receiving means between the operation panel for selecting a predetermined temperature control function and the system control means for transmitting the number of signal lines It is to provide a data transmission and reception device of an automatic temperature control system that greatly reduces the number, and checks the input of the function switch of the operation panel at regular intervals and simply transmits the corresponding signal to the system control means.

In order to achieve the above object, an apparatus of the present invention includes a control panel including a plurality of function switches and a display unit to adjust and display a temperature and a ventilation state of a vehicle interior, and a predetermined function switch key input of the control panel. System control means for scanning and outputting a predetermined control signal corresponding thereto, data transmission and reception means implemented between the operation panel and the system control means and transferring switch input information of the operation panel to the system control means, and the system control means. According to the predetermined temperature and the ventilation-related control signal of the temperature control unit is provided with a temperature adjusting and driving operation corresponding thereto.

In addition, the data transmission and reception means, input key data receiving means for checking the input state of the function switches of the operation panel, and the output signal of the input key data receiving means is cleared to count a predetermined clock signal and corresponding data selection Counting means for generating a signal and an input / output selection control signal, selecting means for selecting data received by said input key receiving means in response to a data selection signal of said counting means, and said selecting means in synchronization with a predetermined clock signal; A data input / output means for serially communicating the input state of the function switches of the operation panel with the system control means, and in response to the control signal of the counting means and the control signal of the system control means. Input / output selection means for converting to the input or output mode and the image in synchronization with a predetermined clock signal. And data display control means for receiving an output signal of the data input / output unit and outputting a corresponding signal to the operation panel unit.

Further, another configuration of the data transmission / reception means includes: input key reception means for checking input of function switches of an operation panel, and an output signal of the input key reception means to count a predetermined clock signal and corresponding data; Counting means for outputting a selection signal, selection means for receiving predetermined data from the input key receiving means according to the output signal of the counting means, and receiving and operating an output signal of the selection means in synchronization with a predetermined clock signal; Data input and output means for inputting and outputting data for serially communicating the input state of the function switches of the panel with the system control means and various calculation data of the system control means on the display of the operation panel; Input / output for converting the data input / output means into an input or output mode according to an output control signal And selecting means receives the output signal of said data output means and a signal corresponding thereto, characterized in that the data display control means for outputting to the control panel.

1 is a block diagram showing a conventional vehicle automatic temperature control system.

2 is a view showing the operation switch recognition and display device of the automatic temperature control system for a vehicle according to the present invention.

3 is a detailed circuit diagram showing an embodiment of the data transmission and reception means of FIG.

4A, 4B and 4C show communication interrupt programs of the system control means of the present invention.

5 is a detailed circuit diagram showing still another embodiment of the data transmission / reception means of FIG.

* Explanation of symbols for main parts of the drawings

100: Instrument panel. 150: system control means.

200: data transmission and reception means. 205: Input key data receiving means.

210: counting means (counter). 215: selection means (multiplexer).

220: input / output selection means. 225: data input and output means.

230: data display control means. 250: temperature driving section.

Hereinafter, with reference to the accompanying drawings will be described in more detail the present invention.

2 is a block diagram illustrating an automatic temperature control system for a vehicle according to the present invention, which includes an operation panel 100, a system control means 150, a data transmission / reception means 200, and a temperature driver 250.

On the other hand, the operation panel 100 is composed of a plurality of function switches that can select and adjust the temperature and the ventilation-related state of the vehicle interior, and the system control means 150 is a predetermined of the operation panel 100 It is configured to scan a function switch key input and output a predetermined control signal, and the data transmission and reception means 200 is implemented between the operation panel 100 and the system control means 150, and the operation panel It is configured to transmit the switch input information of the 100 to the system control means 150, and the temperature driving unit 250 is a temperature corresponding to the predetermined temperature and the ventilation related control signal of the system control means 150 The adjusting and driving operation is configured to be performed.

That is, the data transmission and reception means 200 is implemented by connecting two signal lines between the operation panel 100 and the system control means 150, respectively, one of the two signal lines of the data transmission and reception means 200 is serial communication It is used to transmit a communication clock signal for transmitting the other one is used to transmit data.

In addition, the communication clock signal is preferably configured to be generated by the system control means 150 that can communicate with the external circuit.

3 is a detailed circuit diagram illustrating an embodiment of the data transmission and reception means of FIG. 2, which includes an operation panel 100, a data transmission and reception means 200, and a system control means 150.

On the other hand, the operation panel 100 is a plurality of function switches (101 to 125) for selecting a temperature and the ventilation related functions of a predetermined vehicle interior, and a display unit 130 for displaying the temperature and ventilation related information of the vehicle interior Consists of.

Further, the data transmission / reception means 200 includes input key data receiving means 205 for checking the input state of the function switches 101 to 125 of the operation panel 100, and also the input key data receiving means 205. A counter 210 that is cleared to an output signal of a counter and generates a data selection signal and an input / output selection control signal corresponding to the predetermined clock signal, and receives the input key in response to the data selection signal of the counter 210. The multiplexer 215 for selecting data received by the means 205 and the output signal of the multiplexer 215 in synchronization with a predetermined clock signal are input to control system input states of the function switches of the operation panel 100. Data input / output means 220 for inputting and outputting data for serial communication with the means and data for displaying various operation data of the system control means 150 on the display unit 130 of the operation panel 100; Input / output selection means 225 for converting the data input / output means 220 into an input or output mode in response to the control signal of the controller 210 and the control signal of the system control means 150, and in synchronization with a predetermined clock signal. And a data display control means 230 for receiving an output signal of the data input / output unit 220 and outputting a signal corresponding thereto to the operation panel unit 100.

In addition, the system control means 150 outputs a communication clock signal to the data input and output means 220, the counter 210, and the data display means 230, and scans the data of the data input and output means 220 It is configured to output a predetermined control signal corresponding thereto.

The function switches of the operation panel 100 are configured to perform a one-touch function so that the switch data corresponding to the switch once is transmitted to the system control means 150 regardless of the switch structure, and the operation panel 100 When the REC switch 113 is pressed once among the function switches, predetermined switch data is transmitted to the system control means 150, and when it is pressed again, the switch function is implemented so that the data is disabled (another key). The switch data is not disabled by the switch), and when the DEF switch 109 is pressed once, the key data is transmitted to the system control means 150, and the AUTO, ECO, and OFF switches 115, 117, and 119 are used. The data is configured to be disabled only by.

In addition, in the present invention, since the system control means 150 uses a serial communication method among the communication functions, the usage may vary slightly depending on the specification of the system control means to be used. In the present invention, the system control means 150 Samsung Electronics' microcomputer model KSC88C4116 was used to implement a control panel switch recognition system for a data transmission / reception circuit of an automatic temperature control system.

The system control means 150 uses an interrupt function in communication. In other words, it is a function that allows the communication program to operate at regular intervals. Therefore, when the circuit is configured by using such a function, the communication program operates every predetermined period, so that the input state of the function switches of the operation panel 100 is checked once every predetermined period, so that the control panel 150 is connected to the system control means 150. The input state of the function switches of 100 may be transmitted.

In addition, after the system control unit 150 recognizes the operation state of the switches of the operation panel 100, the operation state of the switches of the operation panel 100, the display of the temperature inside the vehicle, and the outlet of the air flowing into the vehicle. It also has a function of displaying the operating state of the automatic temperature control system, such as, and the air volume intensity on the display unit 130 of the operation panel 100. In order to perform the above functions, the system control means 150 sends the operation state of the switches of the operation panel 100 to the data input / output means 220 of the data transmission / reception means 200. At this time, the data input / output means 220 constitutes a circuit so that the input / output selection means 225 is ready to input data sent from the system control means 150.

That is, the data input / output means 220 is switched to the input mode by its own circuit (input / output selection means 225) of the data transmission / reception means 200, and the data input / output means 220 is a predetermined value of the system control means 150. The controller receives the data and displays a temperature related state of the vehicle interior on the display unit 130 of the operation panel 100.

On the other hand, the table below shows the number of bits of data for serial communication of the input key state with the system control means 150.

AUTO ECO REC DEF VENT FOOT B / L D / F 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 bit

The input order of data transmitted to the system control means 150 is determined by the connection order of the input key receiving means 205 of the data transmitting and receiving means 200 and the signal line 35 connecting the function switch of the operation panel 100. do. For example, if the system control means uses 8-bit system control means and the data of the function switch of the operation panel is transmitted to the system control means 150 in the order shown in Table 1 above, the system will be described by the flowchart shown in FIG. The control means recognizes the input state of the function switches to perform various operations according to the input state, and display the calculated data on the various data on the display module of the operation panel. Since the present invention uses a serial communication method among communication functions possessed by the system control means, the usage thereof may be slightly different depending on the specification of the system control means to be used.

In the present invention, since the input key data uses 8-bit system control means as shown in Table 1, the 8-bit forms one byte, and the bit order is the input key data receiving circuit of the operation panel and the data transmitting / receiving means 200. It is decided by the connection with (205).

Next, an operation process of the system control means for performing the above-mentioned operation is shown in FIG. 4, and the operation thereof will be described in more detail with reference to FIG. 3.

4A shows the serial input / output interrupt routine of the system control means. When the serial communication program interrupt is applied, the system control means 150 transmits data on the input state of the function switches of the operation panel 100 through the data transmission / reception means 200. Prepare to enter (step 760). In operation 762, data regarding the input state of the function switches of the operation panel 100 is stored at an address of RECEIVE. An input data receiving program is performed (step 764). After the input data receiving program ends, the wait bit is cleared (step 766).

4B is a program for explaining an operation of receiving input data by the system control means, and checks whether data stored in the RECEIVE address is 0 (step 770). If 0, the program terminates. If not, the data 08H is stored at the R1 address (step 772). The data stored in the RECEIVE address is stored in the R2 address (step 774). 00H is stored in the MEM address (step 776). In operation 778, it is checked whether the 0 bit data of the data stored in the R2 address is 1 (step 778). In step 778, since the 0 bit means the D / F switch 107 among the function switches of the operation panel, it is determined whether the D / F switch is turned on among the function switches of the operation panel 100. If step 778 is satisfied, the data stored in the B RECEIVE address is stored in the RECEIVE address (step 780). Check whether the data value stored in the B RECEIVE address is 10H (step 782). By the data format, 10H means the DEF switch 109 among the function switches of the operation panel 100. If step 782 is satisfied, 0FH is ORed to the value stored in the MEM address (step 784). If step 782 is not satisfied or after step 784, it is determined whether the data value of the B RECEIVE address is 20H (step 786). That is, 20H means the REC switch 113 among the function switches of the operation panel 100 according to the data format. If step 786 is satisfied, it is checked whether the data value of the MEM address is larger than 1FH (step 788). Thus, if step 788 is satisfied, the data value of the MEM address is logically multiplied by 0FH (step 790). If the step 790 is not satisfied, the logical value 0FH is added to the data value of the MEM address (step 800). If step 778 or step 786 is not satisfied, the data stored in the R2 address is shifted 1 bit to the right after step 790 or step 800 (step 792). Subtract 01H from the data value 08H stored at the R1 address (step 794). Check whether the data value stored in the R1 address is 01H (step 796). The value stored in the R1 address is 01H. If the interrupt of the communication program continues, the data value of the R1 address continues to decrease and is stored in the R1 address because it is programmed to shift the data value of the R2 address by one bit to the right. If the data value is 01H, it means the ECO switch 117 among the function switches of the operation panel 100. If step 796 is not satisfied, it is checked whether the data value stored at the R1 address is 00H (step 798). ). If the data value stored in the R1 address is 00H, the data value of the R1 address continues to decrease when the interruption of the communication program is continued, and it is programmed to shift the data value of the R2 address by 1 bit to the right. If the stored data value is 00H, it means the AUTO switch 115 among the function switches of the operation panel 100. If step 798 is not satisfied, step 778 is reached. If step 798 is satisfied, it is checked whether 0 bit of data stored in the R2 address is 1 (step 806). If step 806 is not satisfied, the program is terminated. If satisfied, the program is logically multiplied by 0FH to the data value stored in the MEM address (step 808). If step 796 is satisfied, it is checked whether the 0 bit of the data stored in the R2 address is 0 (step 802). If step 802 is satisfied, the data value stored in the MEM address is logically multiplied by 0FH and the process proceeds to step 798 (step 804). If step 802 is not satisfied, step 798 is reached. By performing such an operation, the system control means 150 may recognize the operation state of the switches of the operation panel 100.

4C is a program illustrating a data input / output operation process of the system control means and the data transmission / reception means. First, the system control means 150 recognizes the operation state of the operation panel switches by the program of FIG. 4B and then performs an operation. In step 820, a signal is transmitted to the input / output selection means 225 of the data transmission / reception means 200 to prepare to receive data, and in 822, the control mode switches to the output mode of the communication port of the system control means 150.

In step 824, the information at the address of B-Receive in the communication program of FIG. 4B is loaded into the address of TRANS. Then, if the information of the address of the trans is 0FFH, go to 828 and enter 00H at the address of Trans. Load the data value, or outputs to the data input / output means 225 of the transmission / reception means 200.

Next, at 832, the system control means 150 has a slight down time (about 100us) after transmitting the data. The time can be set slightly differently according to the user.

Next, at 834, the signal of the control port of the system control means 150 is disabled (i.e., the transmission mode), and then the 836 switches the communication port to the input mode (i.e., the system control means is switched to the reception mode). Then exit the program.

FIG. 5 is a detailed circuit diagram showing still another embodiment of the data transmission and reception means of FIG. 2, which includes an operation panel 100, a data transmission and reception means 200, and a system control means 150. As shown in FIG.

On the other hand, the operation panel 100 is a plurality of function switches (101 to 125) for selecting a temperature and the ventilation related functions of a predetermined vehicle interior, and a display unit 130 for displaying the temperature and ventilation related information of the vehicle interior Consists of.

In addition, the data transmission and reception means 200 is cleared by an input key receiving means 205 for checking input of the function switches of the operation panel 100 and an output signal of the input key receiving means 205, and a predetermined clock signal. A counter 210 for counting and outputting a corresponding data selection signal, a multiplexer 215 for receiving predetermined data from the input key receiving means 205 according to the output signal of the counter 210, and The output signal of the multiplexer 215 is synchronized with the clock signal of the control panel, and the input state of the function switches of the operation panel is serially communicated with the system control means. Data input / output means 220 for inputting / outputting data for display and input / output for converting the data input / output means 220 into an input or output mode according to a predetermined control signal. And a data display control means 230 for receiving an output signal of the data input / output means 220 and outputting a signal corresponding thereto to the operation panel 100.

In addition, the system control means 150 outputs a clock signal to the data input / output means 220 and the counter 210, outputs an input / output mode switching control signal of the data input / output means 220, and the data input / output means. It is configured to scan the data of 220 and output a predetermined control signal corresponding thereto.

In the above, the input / output selection unit 225 receives a signal from the system control unit 150 and outputs a signal for switching the data input / output unit 220 to the input mode or the output mode to switch the data input / output unit 220 to the input mode. Configure. The data input / output means 220 sends data sent from the system control means 150 to the data display means 230, and the data display means 230 transmits the information to the display unit 130 of the operation panel 100. Pass it to indicate that the entire system is running.

According to the present invention, if the circuit and the program are simply configured to perform the above-mentioned operation, the system control means easily recognizes the information of the operation panel in configuring the automatic temperature control device for the vehicle, and the various information of the system control means. Can be marked on.

Therefore, as described above, the present invention implements a serial communication data transmission / reception means between an operation panel for selecting a predetermined temperature control function and a system control means for transmitting the signal, thereby greatly reducing the number of signal lines, thereby reducing the number of circuit lines. Since it can be configured simply, it is possible to greatly reduce the trouble caused by the signal line.

Claims (3)

A control panel including a plurality of function switches and a display unit for adjusting and displaying a temperature and a ventilation state of a vehicle interior, and scanning a predetermined function switch key input of the control panel and outputting a predetermined control signal corresponding thereto. A system control means, implemented between the operation panel and the system control means and corresponding to the data transmission and reception means for transmitting the switch input information of the operation panel to the system control means according to a predetermined temperature and ventilation related control signal of the system control means And a temperature driver for performing temperature adjustment and driving operation. The data transmission and reception means according to claim 1, wherein the data transmission and reception means comprises: input key data receiving means for checking input states of function switches of an operation panel, and an output signal of the input key data receiving means to count a predetermined clock signal. Counting means for generating a data selection signal and an input / output selection control signal corresponding thereto, selection means for selecting data received by the input key receiving means in response to the data selection signal of the counting means, and a predetermined clock signal; A data input / output means for receiving the output signal of the selection means and serially communicating the input state of the function switches of the operation panel with the system control means in response to the control signal of the counting means and the control signal of the system control means. Input / output selection means and a predetermined clock for converting the data input / output means into an input or output mode And data display control means for receiving an output signal of the data input / output unit in synchronization with a signal and outputting a signal corresponding thereto to the operation panel unit. The apparatus of claim 1, further comprising: an input key reception means for checking input of function switches of an operation panel, and an output signal of the input key reception means to count a predetermined clock signal; Counting means for outputting a data selection signal corresponding thereto, selection means for receiving predetermined data from the input key receiving means according to the output signal of the counting means, and an output signal of the selecting means in synchronization with a predetermined clock signal Data input / output means for inputting and outputting data for inputting the input state of the function switches of the operation panel to the system control means and serial operation data of the system control means on the display of the operation panel; Convert the data input / output means into input or output mode according to the output control signal of the system control means Key is input and output selecting means, and data transmitting and receiving apparatus of an automatic temperature control system, characterized in that the data display control means which receives the output signal of said data output means outputs the signal corresponding to the operation panel.